26 



GUIDE. 



berry, and the new Black Chinese Mulberry or Morus 

 multicaulis, these being two of the main varieties on which 

 the insect feeds. The silk-worm is by no means so del- 

 icate as many may imagine. Mr. Cobb " saw the in- 

 sects raised by Mr. D'Homergue in a yard of mulberry 

 trees in the city of Philadelphia, which endured cold, 

 windy days, and storms of rain and thunder ; a few of 

 which, notwithstanding, spun in thirty days, and pro- 

 duced excellent cocoons." At Northampton, also, which 

 is a village situated in the valley of the great northern 

 artery of the river Connecticut, the eggs of the silk- 

 worm which had been deposited on the outside of a 

 window frame, remained uninjured and hatched well, 

 although they had endured alternate sunshine, and cold 

 winds and storms, and the extreme rigors of the uncom- 

 mon winter of 1834-5, and a degree of cold 33 deg. 

 below zero. 



Change of climate affects the breed of silk-worms for 

 a time, whether such changes are from cold to heat, or 

 from heat to cold ; but of the two, it is better that they 

 should be brought from a colder climate rather than 

 from one which is warmer. 



A shelter, however, is necessary for the silk-worm; 

 alike to defend from long and fatal storms, and from 

 their enemies, the innumerable and otherwise useful 

 birds of prey. 



SECTION V. 



MULBERRY. (Menus.) 



THE mulberry, or morus of the botanists, is a genus 

 comprising many species. It derives its name from Mor, 

 in Celtic, black. Its origin has been assigned to China, 



